Breech loading fire arm



(No Model.)

H. M. POPE.

BRBEGH LOADING FIRE ARM.

Patented June 12, 1888.

y Q. 2 i y l E "tgb O E m y E UNITED STATES PATENT OFFICEc HARRY lf.IOlll, F HARTFORD, CONNllU'lICU'I, ASSIGNOI 0F ONE-HALF 'lO llUDlilCY S.SlCYlOUlt, OF SAME PLACE.

BREECH-LOADING FIRE-ARM.

SPECIFICATION forming part of Letters Patent No 384,277, dated June l2,1888.

Application filed January ll, IFFR.

T0 all 10710711, it may concern:

De it known that I, HARRY M. Porn, of Hartford, Connecticut, haveinvented a new and useful Improvement in Brcech-Loading Guns, of whichthe following description and claims constitute the specification, andwhich is illustrated by the accompanying sheet of d raw n gs.

rlhis invention consists of a separable coinbination ofthe receiver andthe gnubarrel of a gun; and it consists, also, ofau adjustable combination of the firing-pin and the breech block of a gun.

The object of making the barrel separable from the receiver is to admitofthe easy suhstitntion of barrels of various calibers for each other inthe saine gun; and the object of the specified combination ot' thefiringpin and the breeclrblock is to make the firingpin adjustable inposition, so that it will operate upona center-fire cartridge or a rinrtire cartridge, as i may be desired.

Figure l ofthe drawings isaside fragmentary view of a gun containing myimprovements. Fig. 2 is a central horizontal longitudinal section of thereceiver and of the rear ward portion of the gnnbarrel and of the sleevewhich unites them. Fig. 3 is a central horizontal longitudinal sectionof the forward part ofthe receiver and of the rearward part of theguirbarrel and of the sleeve when the latter is upon the barrel, but isnot upon the receiver. Fig. 4 is a view of a modified form of what isshown in Fig. 2, and showing only the receiverand the sleeve in section.Fig. 5 is a central vertical fragmentary section ofthebreech-block,ishowiug the firing-pin within it and opposite t0 aceutcr-re cartridge. Fig. G is the same as Fig. 5, except that thebushing which holds the firing-pin has been turned one hundred andeighty degrees upon its axis, so as to bring thc point of the firing-pinoppoA site the riin of the cartridge. Fig. 7 is a. vcrtical crosssectionon the dotted line of Fig. 6.

The letter A indicates the receiver, while the letter B denotes thegun-barrel, and C is the sleeve which unites them. The barrel is guidedto its scat in the receiver by means of its slot D and the point of theset-screw E.

Serial No. 260.109. (No modeLl l The letter F indicates l hehreeclrhlock, while (t is a bushing closely fitted within an aperturcwhich extends through the breech-block backward from the bore of thebarrel. The axis of that aperture is parallel with the axis of the boreot' the barrel, but is located at a distance below the latter axiscorresponding with one quarter of the diameter of that bore. Thefiring-pin H works in an aperture which passes through the bushingdiagonally to the axisthercof, the rear end ot' its axis being coincident with the axisof the bushing, but the forward end of the axis ofthe tiring-pin being placed at a distance above the axis of the bnshingcorresponding with one-quarter ofthe diaineter ofthe bore of the barrelwhen the parts are in the position show n in Fig. 5, and correspondinglybelow that axis when the parts are in the position shown in Fig. (i.

The tiring-piu is limited in its longitudinal motion in the bushing bythe pin I, working in the recess J', and the bushing is provided withthe recess K and a corresponding recess on its opposite side for thealternate reception of the set screw L, which is tapped into the side ofthe breech-block F. The bushing is also provided with the recesses M andN upon its rearward face for the reception of a bifureated implement bymeans of which the hushing may be turned one hundred and eighty degreesupon its axis, so as to shift the point of the tiring-pin from itsposition shown in Fig. 5 to that shown in Fig. (i, or vice versa, theset-screw L being withdrawn from one of its recesses to permit thatshifting, and then being inserted in the opposite recess to hold thebushing in its new position.

The cartridge is represented by the letter O.

The sleeve C in Figs. 2 and 3 has an exterior diameter which ispreferably identical with the horizontal thickness of the receiver A,and has its interior diameter of two different sizes, the larger oneofthe two being at the rearward end of the sleeve. That larger diaineter is sorewthreadcd to correspond with the screw-th reads on theforward reduced end 95 ofthe receiver, while the smaller diameter of thesleeve is screw-threaded to correspond with the screw-threads on theadjacent part of the guirbarrel. Thescrewthrcadson the receiver exceedin piteh those on the gun-barrel1 so that when the sleeve C isturncdbaek ward from its position in Fig. 3 to that in Fig. 2 it will travellongitudinallyl along the receiver faster than it travels along thelgun-lmtrrel, thnsdrawing the guirbarrel into the receiver Somewhatslowly', but very powerfully. I recommend that the threads upon thereceiver be twenty fou r to the inch, while those upon the gun-barrelarc twen tty-six to the inch; but it is evident that a greateroralessdiversity| than this between the pitches of' the two serewthreadswill operatein the same way. '1`hc.li[`ferential screw-threads thusconstructed upon the receiver, the gunbarrcl, andthe sleeve constitute ameans of conveniently fastening thc barrel within the receiver withgreat rigidity, and with no larger' expenditure ofpower than may beconveniently exerted by the hand of the gunner upon the exterior milledsurface ot' the sleeve.

The modified form shown in Fig. 4 differs from that shown in Figs. 2 and3 in that the screw-threaded union between the sleeve and the glnrbarrelis omitted, and the annular shoulder l upon the gun-barrel and the annular ange (g upon the sleeve is substituted therefor. This constructionis inferior to the other; but it is superior to any third method knownto me of removably fastening a gun barrel in the receiver of a gun.

I claim as my invention- 1. The combination of the receiver A, pro videdwith a forward extension, the barrel I, provided with a rearwardextension accurately and removably fitted within the receiver, and thesleeve tf, interiorly serc\\'threaded and tit ted to the exteriorof theforward projection y ot' the receiver and to the exterior of theadjaeent part of the barrel,and adapted by being,r

turned upon its axis to rigidly fasten the barrel to the receiver, allsubstantially as described.

2. The combination ofthe receiver A, proA vided with an exteriorlyscrew-threaded forward extension, the barrel B, removably fitted to thereceiver and provided with an exterior screw-thread ofsmallerdiameterand less pitch than that ofthe receiver A, and the sleeve C,provided at one end with an interior screwthread conforming to thescrewthread of the receiver A, and at'. the other end with an interiorscrewthread conforming to the sercwthread of the barrel l, allsubstantially asde scribed.

3. The Combination of the breeelrbloek F, the bushing (l, adjustablyfitted within the breeelrbloek, and the tiringv pin Il', working` withinthat bushing` diagonally to the axis thereof, substantially asdescribed.

January i2, 1838.

HARRY M. POPE.

XVit nesses:

ALBERT H. WA Lann, FRANK II. Prnnrou'r.

